1. Each share of Class A Common Stock was issued upon the conversion of one share of Class B Common Stock.

2. Each share of Class B Common Stock is convertible at any time at the option of the holder into one share of Class A Common Stock. In addition, each share of Class B Common Stock will convert automatically into one share of Class A Common Stock upon any transfer, whether or not for value and whether voluntary or involuntary or by operation of law, except for certain transfers described in the issuer's amended and restated certificate of incorporation, including, without limitation, certain transfers for tax and estate planning purposes.

3. Not applicable.

4. Shares were sold pursuant to a 10b5-1 Plan.

5. The shares were sold at prices ranging from $91.97 to $92.94. The reporting person will provide upon request to the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price.

6. The shares were sold at prices ranging from $93.00 to $94.00. The reporting person will provide upon request to the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price.

7. The shares were sold at prices ranging from $94.005 to $94.9425. The reporting person will provide upon request to the SEC, the issuer or security holder of the issuer, full information regarding the number of shares sold at each separate price.

Keenan Conder, Attorney-in-Fact

05/16/2018

** Signature of Reporting Person

Date

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.

* If the form is filed by more than one reporting person,
see
Instruction
4
(b)(v).